Adaptive medium access control for minimum energy reliable data delivery in wireless sensor networks
Junhua Zhu, Shan Chen, Brahim Bensaou · 2007
In this paper, we propose and study two adaptive media access control protocols to support probabilistic data delivery reliability in sensor networks using MAC layer retransmissions. Since retransmissions consume energy, our adaptive p-persistent CSMA protocols tune their persistence probabilities in an effort to minimize the expected number of retransmissions that meet a given probabilistic reliability requirement, and thereby minimize energy consumption in the network. We formulate this problem of reliability with minimal energy consumption at the MAC layer as a constrained optimization problem and then derive the algorithms to adapt the persistence probabilities using the Lagrangian dual decomposition method.